1. Leaf and canopy photosynthesis of a chlorophyll deficient soybean mutant
- Author
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Sakowska, Karolina, Alberti, Giorgio, Genesio, Lorenzo, Peressotti, Alessandro, Delle Vedove, Gemini, Gianelle, Damiano, Colombo, Roberto, Rodeghiero, Mirco, Panigada, Cinzia, Juszczak, Radoslaw, Celesti, Marco, Rossini, Micol, Haworth, Matthew, Campbell, Benjamin W., Mevy, Jean-Philippe, Vescovo, Loris, Cendrero‐mateo, M. Pilar, Rascher, Uwe, Miglietta, Franco, Institute of Ecology, Department of Meteorology, Sustainable Agroecosystems and Bioresources Department, IASMA Research and Innovation Centre-Fondazione Edmund Mach - Edmund Mach Foundation [Italie] (FEM), Department of Agricultural, Food, Environmental and Animal Sciences, Università degli Studi di Udine - University of Udine [Italie], Institute of Biometeorology, FoxLab [Italia], Consiglio Nazionale delle Ricerche (CNR)-Fondazione Edmund Mach - Edmund Mach Foundation [Italie] (FEM), Department of Earth and Environmental Sciences [Milano], Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Tree and Timber Institute, University of Minnesota [Twin Cities] (UMN), University of Minnesota System, Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Institute of Bio- and Geosciences [Jülich] (IBG), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, Institute for Advanced Studies - Aix-Marseille University (IMéRA), Universität Innsbruck [Innsbruck], National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)-Fondazione Edmund Mach - Edmund Mach Foundation [Italie] (FEM), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Sakowska, K, Alberti, G, Genesio, L, Peressotti, A, Delle Vedove, G, Gianelle, D, Colombo, R, Rodeghiero, M, Panigada, C, Juszczak, R, Celesti, M, Rossini, M, Haworth, M, Campbell, B, Mevy, J, Vescovo, L, Cendrero-Mateo, M, Rascher, U, and Miglietta, F
- Subjects
Chlorophyll ,Photons ,NPQ relaxation 31 ,Time Factors ,Steady state and dynamic photosynthesis ,NPQ relaxation ,Physiology ,Photosystem II Protein Complex ,food and beverages ,Plant Transpiration ,Plant Science ,Carbon Dioxide ,steady state and dynamic photosynthesis ,Canopy photosynthesis ,Oxygen ,Plant Leaves ,Leaf ,Settore BIO/07 - ECOLOGIA ,Mutation ,Biomass ,Soybeans ,Photosynthesis ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,steady state and dynamic photosynthesi - Abstract
International audience; The photosynthetic, optical and morphological characteristics of a chlorophyll-deficient (Chldeficient) “yellow” soybean mutant (MinnGold) were examined in comparison with two green varieties (MN0095 and Eiko). Despite the large difference in Chl content, similar leaf photosynthesis rates were maintained in the Chl-deficient mutant by offsetting the reduced absorption of red photons by a small increase in photochemical efficiency and lower non-photochemical quenching (NPQ). When grown in the field, at full canopy cover, the mutants reflected a significantly larger proportion of incoming shortwave radiation, but the total canopy light absorption was only slightly reduced, most likely due to a deeper penetration of light into the canopy space. As a consequence, canopy-scale grossprimary production and ecosystem respiration were comparable between the Chl-deficient mutant and the green variety. However, total biomass production was lower in the mutant, which indicates that processes other than steady state photosynthesis, caused a reduction in biomass accumulation over time. Analysis of NPQ relaxation and gas exchange in Chl-deficient and green leaves after transitions from high to low light conditions suggested that dynamic photosynthesis might be responsible for the reduced biomass production in the Chl-deficient mutant under field conditions.
- Published
- 2018
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